Size help 29 er

I'm looking at the full suspension Motobecand Fantom 29er, I ride an older GT hard tail now and I think it's a 19". I'm 6'1" my inseem to pelvic bone is 32" what size do you think I need the 47 cm or the 52 cm??? According to all bike sizing I should get the 52 but I have never been on a Motobecane so I don't know how the sizing runs thanks for the help.

So I measured my old frame from the center of the crank to the top of the seat tube, measured 20.5 inches. So I bought the 52cm. My old bike had a 32" stand over. The 52cm has a 31.5" stand over so I think I'm good. I was hoping to get some help from someone that had this bike, oh well. I ordered the 2013 Motobecane Fantom Team 26" 30 Speed
Full Suspension Mountain Bike today I hope it fits!!

Best of luck. don't have that one so I can't help with size. My moto is one of their hybrids, so completely different geometry, plus it's a hardtail. Best of luck, and let us know how the size comes out.